It is relatively easy and you can do it with nothing to loose. Since you are going to eat these anyway, crack them open into a skillet and compare to pix in the following thread. https://www.backyardchickens.com/t/16008/how-to-tell-a-fertile-vs-infertile-egg-pictures
I have heard of peeps hatching Trader Joe's eggs that are free range, but many free range farmer do not necessarily keep roosters.
WISHING YOU BEST